What should the D0170 chart note include?
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Re-evaluation - limited, problem focused. RMH: Medical history reviewed/updates Original problem: Original problem Original treatment date: Original treatment date Original treatment: Original treatment Current Status: Current Status Patient reports: Patient reports Symptoms resolved: Symptoms resolved Symptoms improved: Symptoms improved Symptoms unchanged: Symptoms unchanged Symptoms worsened: Symptoms worsened Clinical Exam: Area examined: #Tooth number(s) Visual findings: Visual findings Percussion: Percussion response Palpation: Palpation response Probing: Probing Radiographs (if taken): Radiographs taken/reviewed and findings Comparison to previous: Comparison to previous Assessment: Healing: Healing Response to treatment: Response to treatment Plan: Plan Continue current treatment. Modify treatment: Modify treatment Additional treatment needed: Additional treatment needed Referral: Referral details Patient instructions: Patient instructions NV: Next visit Exam baseline support: Decay/fractures/mobility/existing restorations/open margins/recession/bruxism/TMJ/occlusion/soft tissue findings Radiographs/photos reviewed: Images taken/reviewed/interpreted and findings Diagnosis/prognosis by tooth/area: Specific diagnosis and prognosis where applicable
What documentation is required for D0170?
A defensible D0170 chart note has to make three things obvious: (1) this is an established patient, (2) you previously evaluated the same problem, and (3) today's visit is a focused re-check, not a post-op or a fresh complaint.
Required elements:
- Reference to the original problem — what was diagnosed, when it was first seen, and which provider in the practice originally evaluated it
- Reason for the re-evaluation today — "scheduled 3-month trauma follow-up #8," "2-week recheck of buccal leukoplakia," "recheck after antibiotic therapy for #14 swelling"
- Updated medical history — confirm no changes or document new meds, conditions, allergies
- Patient-reported status — symptoms resolved, improved, unchanged, or worsened (use the patient's words when possible)
- Focused clinical exam of the area — tooth/site, visual findings, percussion, palpation, probing, mobility, soft-tissue inspection as relevant to the problem
- Diagnostic tests as indicated — cold/EPT for traumatized teeth; transillumination for cracks; photographs for lesions to support comparison
- Radiographs — billed separately (D0220, D0230, D0270/D0274) when taken; document tooth/region and what was interpreted, not just "PA taken"
- Comparison to previous findings — this is what makes the note a re-evaluation. "Pulp #8 now responsive to cold (was non-responsive 3 months ago)," "lesion measures 4 mm, unchanged from initial visit," "swelling resolved, no sinus tract"
- Updated assessment / prognosis — healing as expected, deteriorating, or unchanged
- Plan — continue monitoring, modify treatment, perform definitive treatment today, refer, or biopsy
- Patient instructions and next visit
- Provider signature
The "amnesia test" applies: a third party reading only this note must be able to tell that the same problem was previously assessed, what changed, and why a re-evaluation was clinically necessary today. Without that linkage to the prior encounter, carriers will treat D0170 as either an inappropriately coded D0120 or an emergency-style D0140.
Why does D0170 get denied?
The most common reasons D0170 is denied or audited:
- Note doesn't reference the prior visit — without a clear link to the original diagnosis date and provider, the carrier reads the encounter as a D0120 or D0140 and denies/down-codes
- Reads like a post-op visit — if the prior visit involved a procedure you performed, the carrier reclassifies as D0171 and denies (D0171 is typically bundled into the global period)
- Reads like a routine recall — no problem-specific findings, just a generic "no changes" note. Carriers down-code to D0120 or deny outright
- Frequency exceeded — patient already used the combined eval allowance, or hit the carrier's specific D0170 cap
- Same-day evaluation conflict — billed alongside D0120/D0140/D0150/D0160/D0180 on the same DOS
- Bundled into a same-day procedure — D0170 + RCT or D0170 + extraction on the same tooth gets bundled by some plans
- Missing tooth number, site, or area examined — payer can't confirm it was problem-focused
- No comparison to prior findings — the visit isn't actually a re-evaluation, just a second look
- Used as a substitute for routine recall — auditors flag practices that bill D0170 repeatedly for the same patient to bypass D0120 frequency limits
- Missing provider signature
What do practices ask about D0170?
What's the difference between D0170 and D0140?+
D0140 is the first time you're evaluating a specific problem (acute pain, trauma, swelling, broken tooth). D0170 is the follow-up re-evaluation of a problem you already assessed at a prior visit. The classic sequence is D0140 → watchful waiting or initial treatment → D0170 to recheck. If the patient shows up with a brand-new complaint, code that visit D0140 — not D0170 — even if they're an established patient.
What's the difference between D0170 and D0171?+
D0170 is the re-evaluation of a condition (e.g., monitoring a traumatized tooth or a soft-tissue lesion). D0171 is the post-operative evaluation of a procedure you performed (e.g., suture check after extraction, post-op visit after periodontal surgery or RCT). Most carriers consider D0171 part of the procedure's global period and bundle it, so it's typically a no-charge visit and not separately reported. Don't substitute D0170 for D0171 to capture revenue on a post-op — that's a known audit pattern.
Can D0170 be billed on the same day as treatment?+
Yes, in principle — D0170 is a separate diagnostic code. However, when D0170 is billed alongside a definitive procedure on the same tooth (e.g., D0170 + D3330 RCT or D0170 + D7140 extraction), many carriers bundle the evaluation into the procedure unless the note clearly documents a distinct cognitive workup separate from the treatment decision. D0170 same-day with a procedure on a different tooth is generally fine.
How often can D0170 be billed?+
There's no universal frequency. Most PPO carriers cap it at 1 every 6 months per provider, sometimes pooled with D0171. Some plans (e.g., Liberty Dental on certain designs) allow more frequent re-evaluations for active monitoring scenarios — up to several in a 3-month window for trauma follow-ups — capped annually. Many carriers also count D0170 against the combined evaluation pool with D0120/D0140/D0150/D0180. Always verify with the patient's plan.
Does D0170 require a narrative on the claim?+
Not always required, but strongly recommended. The note (and a claim narrative when needed) should reference the original diagnosis date, the original problem, and what is being re-evaluated today. Without that linkage, carriers commonly down-code D0170 to D0120 or deny it as a duplicate evaluation. If the claim is denied, appeal with the prior visit's chart note, photographs, and any imaging that shows the comparison.
Can hygienists or assistants perform D0170?+
No. Like all CDT D01xx evaluation codes, D0170 must be performed and reported by a licensed dentist (or, in states that recognize them, a dental therapist within their scope). A hygienist performing a periodontal recheck without a dentist's evaluation is not billable as D0170; the closest separately billable visit is typically D4910 periodontal maintenance with appropriate documentation.
Is D0170 used for periodontal re-evaluations after SRP?+
It can be, but most practices report periodontal re-evaluations differently. A 4–6 week re-evaluation after D4341/D4342 (scaling and root planing) is most often documented within the periodontal visit and either coded as D0170 if the visit is only the focused perio recheck by the dentist, or rolled into the next D4910 perio maintenance visit. Hygiene-only periodontal probing rechecks without a dentist's evaluation are not D0170. Carrier policies vary, so verify before billing.